Injection mold with forming cavity exhaust structure
By implementing a vacuum-assisted air evacuation system with exhaust ports and connectors, the issue of air entrapment in mold cavities is resolved, resulting in higher-quality and more reliable plastic injection molding.
Patent Information
- Application Number
- CN202421937969.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-12
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-08-12
AI Technical Summary
During the injection molding process, the air inside the mold cannot be effectively discharged, resulting in bubbles or holes generated after the injection molded parts cooled, affecting product quality.
An injection mold with a molding cavity exhaust structure is designed, including multiple evacuation holes, U-tubes, connecting pipes, screw joints, evacuation tubes and air pumps. Through these components, the air inside the mold is extracted during the injection molding process to ensure a reduction in air content.
It improves exhaust efficiency, reduces the generation of bubbles or holes after cooling of injection molded parts, and improves the pass rate and practicality after mold forming.
Smart Images
Figure CN223099850U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of injection molds, and particularly relates to an injection mold with a forming cavity exhaust structure. Background Art
[0002] Injection molding, also known as injection mold molding, is a molding method that combines injection and molding. The advantages of the injection molding method are fast production speed, high efficiency, automation of operation, a variety of color and pattern varieties, the shape can range from simple to complex, the size can range from large to small, and the product size is precise, the product is easy to update, and it can form parts with complex shapes. Injection molding is suitable for molding processing fields such as mass production and products with complex shapes.
[0003] There are various types of injection molds. For example, in a common plastic frame injection mold, during injection molding, workers inject molten plastic into the mold, and after the plastic cools, it can be formed. During the injection molding process, if the air in the plastic molding groove inside the mold is not exhausted, it will cause bubbles or voids in the injection molded part after cooling, thereby reducing the quality of the injection molded part and affecting normal use. Utility Model Content
[0004] To solve the problem, this application provides an injection mold with a forming cavity exhaust structure.
[0005] The injection mold with a forming cavity exhaust structure provided by this application adopts the following technical solutions:
[0006] An injection mold with a forming cavity exhaust structure includes a frame mold and a mold base. A plastic molding groove is provided on the mold base, and the frame mold is fixed on the mold base and located inside the plastic molding groove; a pair of evacuation holes are provided on both sides of the mold base, and the evacuation holes are communicated with the plastic molding groove; a plurality of evacuation pipes are fixed on the outer wall of the mold base, and a screw connection pipe is fixed at the end of the evacuation pipe.
[0007] Optionally, it further includes an air extraction pump. The output end of the air extraction pump is connected with a connecting pipe. A U-shaped pipe is connected to the connecting pipe, and both the U-shaped pipe and the connecting pipe are made of plastic pipe material.
[0008] Optionally, screw connectors are sleeved at both ends of the U-shaped pipe. The screw connectors are slidably connected to the U-shaped pipe, and the screw connectors are threadedly screwed to the screw connection pipes.
[0009] Optionally, a sealing groove is provided on the screw connection pipe, and a sealing gasket is fixed inside the screw connector. The sealing gasket is adapted to the sealing groove.
[0010] Optionally, an insertion pipe communicating with the U-shaped pipe is fixed on the screw connector, and the insertion pipe is inserted into the inner cavity of the screw connection pipe.
[0011] Optionally, the gasket is fixed by gluing and is made of rubber.
[0012] Optionally, a plurality of anti-slip threads are provided on the outer wall of the screw joint.
[0013] In summary, the present application includes the following beneficial technical effects:
[0014] By providing a plurality of evacuation holes, U-shaped tubes, connecting tubes, screw joints, evacuation tubes, screw connecting tubes and insertion tubes, it is convenient to evacuate the air inside the injection mold through an air extraction pump during the injection molding process, thereby reducing the influence of air on the cooled and formed mold. This not only improves the exhaust efficiency but also increases the qualified rate of the formed mold, with high practicality. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;
[0016] Figure 2 is a three-dimensional structural schematic diagram of the partially moved and partially enlarged structure;
[0017] Figure 3 is Figure 2 an axonometric three-dimensional structural schematic diagram of a part of the structure in
[0018] Description of the reference numerals: 1, frame mold; 2, mold base; 3, shaping groove; 4, evacuation hole; 5, air extraction pump; 6, U-shaped tube; 7, connecting tube; 8, screw joint; 9, evacuation tube; 10, screw connecting tube; 11, sealing groove; 12, gasket; 13, insertion tube. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0019] The following further describes the present application in detail with reference to the Figures 1-3 drawings.
[0020] The embodiment of the present application discloses an injection mold with a forming cavity exhaust structure. Referring to Figures 1-3 , an injection mold with a forming cavity exhaust structure includes a frame mold 1 and a mold base 2. A shaping groove 3 is provided on the mold base 2. The frame mold 1 is fixed on the mold base 2 and is located in the shaping groove 3. A pair of evacuation holes 4 are provided on both sides of the mold base 2, and the evacuation holes 4 communicate with the shaping groove 3. A plurality of evacuation tubes 9 are fixed on the outer wall of the mold base 2, and a screw connecting tube 10 is fixed at the end of the evacuation tube 9. The frame mold 1 is an upper mold, which covers the lower mold adapted thereto, thereby preventing molten plastic from entering the evacuation holes 4 during the injection molding process.
[0021] It also includes an air extraction pump 5. The output end of the air extraction pump 5 is connected to a connecting pipe 7. A U-shaped pipe 6 is connected to the connecting pipe 7. Both the U-shaped pipe 6 and the connecting pipe 7 are made of plastic pipe material. At both ends of the U-shaped pipe 6, screwed joints 8 are sleeved. The screwed joint 8 is slidably connected to the U-shaped pipe 6, and the screwed joint 8 is threadedly connected to the screwed connecting pipe 10. During the injection molding process, two air extraction pumps 5 are started, and the air inside the plastic molding groove 3 is extracted through a plurality of evacuation holes 4, so as to reduce the air content in the injection part inside it, avoid the generation of bubbles or cavities after the injection molded part is cooled, improve the quality of the injection molded part, and facilitate normal use.
[0022] In this embodiment, as Figure 1 and Figure 2 shown, a sealing groove 11 is provided on the screwed connecting pipe 10. A sealing gasket 12 is fixed inside the screwed joint 8. The sealing gasket 12 is adapted to the sealing groove 11. The sealing gasket 12 is fixed by gluing and is made of rubber material. An insertion pipe 13 communicating with the U-shaped pipe 6 is fixed on the screwed joint 8. The insertion pipe 13 is inserted into the inner cavity of the screwed connecting pipe 10, which is convenient for improving the connection tightness, thereby improving the exhaust efficiency and greatly reducing the air residue inside the plastic molding groove 3, thus improving the qualified rate of the mold and facilitating use. By setting a plurality of evacuation holes 4, U-shaped pipe 6, connecting pipe 7, screwed joints 8, evacuation pipes 9, screwed connecting pipes 10 and insertion pipes 13, it is convenient to extract the air inside the injection mold through the air extraction pump 5 during the injection molding process, so as to reduce the influence of air on the cooling and molding of the mold. It not only improves the exhaust efficiency but also improves the qualified rate of the molded mold, and has high practicality.
[0023] In this embodiment, as Figure 1 and Figure 2 shown, a plurality of anti-slip lines are provided on the outer wall of the screwed joint 8. This setting is convenient for increasing the friction force, which helps the staff to manually screw the screwed joint 8, facilitates installation or disassembly, and improves convenience.
[0024] The implementation principle of an injection mold with a forming cavity exhaust structure in this application embodiment is: during the injection molding process, two air extraction pumps 5 are started, and the air inside the plastic molding groove 3 is extracted through a plurality of evacuation holes 4, so as to reduce the air content in the injection part inside it, avoid the generation of bubbles or cavities after the injection molded part is cooled, improve the quality of the injection molded part, and facilitate normal use;
[0025] By setting a plurality of evacuation holes 4, U-shaped pipe 6, connecting pipe 7, screwed joints 8, evacuation pipes 9, screwed connecting pipes 10 and insertion pipes 13, it is convenient to extract the air inside the injection mold through the air extraction pump 5 during the injection molding process, so as to reduce the influence of air on the cooling and molding of the mold. It not only improves the exhaust efficiency but also improves the qualified rate of the molded mold, and has high practicality.
[0026] The following points should be noted: First, in the description of this application, it should be noted that unless otherwise specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense, which can be a mechanical connection or an electrical connection, or the communication inside two components, and can be directly connected. The terms "upper", "lower", "left", "right", etc. are only used to represent the relative position relationship. When the absolute position of the object being described changes, the relative position relationship may change;
[0027] Second, in the drawings of the disclosed embodiments of the present utility model, only the structures related to the disclosed embodiments are involved. For other structures, reference can be made to the general design. Without conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;
[0028] Finally, the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.
[0029] The above are all the preferred embodiments of this application and do not limit the protection scope of this application accordingly. Therefore, any equivalent changes made according to the structure, shape, and principle of this application shall be covered by the protection scope of this application.
Claims
1. An injection mold with a forming cavity exhaust structure, comprising a frame mold (1) and a mold base (2), characterized in that: A shaping groove (3) is formed in the mold base (2), and the frame mold (1) is fixed on the mold base (2) and located within the shaping groove (3). A pair of evacuation holes (4) are formed on both sides of the mold base (2), and the evacuation holes (4) communicate with the shaping groove (3). A plurality of evacuation pipes (9) are fixed to the outer wall of the mold base (2), and a screw connection pipe (10) is fixed to the end of the evacuation pipe (9). An air extraction pump (5) is further included. The output end of the air extraction pump (5) is connected to a connection pipe (7). A U-shaped pipe (6) is connected to the connection pipe (7). Both the U-shaped pipe (6) and the connection pipe (7) are made of plastic pipe material.
2. The injection mold with a cavity exhaust structure according to claim 1, characterized in that: Screw joints (8) are sleeved on both ends of the U-shaped pipe (6). The screw joints (8) are slidably connected to the U-shaped pipe (6), and the screw joints (8) are screwed to the screw connection pipes (10).
3. The injection mold with a forming cavity exhaust structure according to claim 2, wherein: A sealing groove (11) is formed in the screw connection pipe (10), and a sealing gasket (12) is fixed within the screw joint (8). The sealing gasket (12) is adapted to the sealing groove (11).
4. An injection mold with a venting structure for a forming cavity according to claim 2, characterized in that: An insertion pipe (13) communicating with the U-shaped pipe (6) is fixed to the screw joint (8), and the insertion pipe (13) is inserted into the inner cavity of the screw connection pipe (10).
5. The injection mold with a venting structure for a forming cavity according to claim 3, characterized in that: The sealing gasket (12) is fixed by gluing and is made of rubber material.
6. The injection mold with a forming cavity exhaust structure according to claim 2, characterized in that: A plurality of anti-slip lines are provided on the outer wall of the screw joint (8).